If the STO function is not needed the plug JVL type WI1010-M08M4SSTO must be inserted in the STO connector.

The need of this external plug to disable the STO function is to obtain a high safety level and make sure that no misunderstandings will occur concerning whether the STO function is active or not.

Part number: WI1010-M08M4SSTO

Standard cable

The standard cable is mandatory to use in applications where the TÜV approval is required.

Part number: WI1010-M08M4V05P

How to connect and use the STO function:

The STO connector contains the two enable inputs STOA and STOB. Both inputs must be applied nominal +24 VDC in order to energize the motor and make any motor movement possible.

If only one of the inputs is not applied +24 VDC the internal STO circuit will remove the energy from the motor. Please note: In a SIL3/PLe application, both channels must be controlled simultaneously.

The illustration below shows the pinout of the connector

Ordering information:

ServoStep motors with the STO function installed are identified in the last two digits of the type number as seen below:

European directives

Machinery Directive (2006/42/EC)

EN ISO 13849-1/2

EN IEC 62061

EN IEC 61800-5-2

EMC Directive (2014/30/EU)

EN 61000-6-3

EN 61800-3

Low Voltage Directive (2014/35/EU)

EN 61800-5-1

Safety standards

Safety of Machinery

EN ISO 13849-1/2, IEC 62061, IEC 60204-1

Functional Safety

IEC 61508-1/2, IEC 61800-5-2

Safety function

IEC 61800-5-2

IEC 60204-1

Safe Torque Off (STO)

Stop Category 0

Safety performance

ISO 13849-1

Category

Cat 3

Diagnostic Coverage

DCavg: 98,5 % (Medium)

Mean Time to Dangerous Failure (per channel)

MTTFd: 100 years (High)

PFHd

4,29e-8/h

Performance Level

PLe

IEC 61508/IEC 62061

Safety Integrity Level

SIL 3, SIL CL3

Probability of Dangerous Failure per Hour

PFHd: 1,38e-10/h
(High Demand Mode)

Diagnostic Coverage

DC: 96 %

Safe Failure Fraction

SFF: 96 %

Common Cause Failure Factor

CCF 5 %

Hardware Fault Tolerance

HFT: 1 (1oo2)

Proof Test Interval T1

20 Years

Mission time TM

20 Years

Reaction time

Input to output response time

Maximum 8 ms.

Response time (internal fault)

Maximum 200 ms.

SISTEMA:

The SISTEMA software utility provides developers and testers of safety-related machine controls with comprehensive support in the evaluation of safety in the context of EN ISO 13849-1.

Many companies use the SISTEMA libraries when designing a machine with several safety components. JVL offers for particular technologies continuously growing SISTEMA-Libraries. The libraries can be used with SISTEMA starting from version 1.1.1. Download the tool here Link to SISTEMA Library.